How do you defeat a SKILLED fighter who's out for your total destruction?

I was watching some knife fighting videos on youtube then the thought came to me "What the hell would I do in that situation?", " Thrust a guard out and have it cut to ribbons!...no I'd shorten my guard and my blocks (I know theres no blocks in wing chun- maybe my defensive hand techniques ) then I'd perform some sort of limb destruction to immobilize the weapon then I turn and take out my opponent.

By the way the attacker is SKILLED! like an EVIL GURO DAN INOSANTO!!!! theres no one stab to guts but a million and one slashes).

1.What would you do?

2.Can you shorten your guard? And what happens to the immoveable elbow theory?

3.Does anyone practice limb destruction in there wing chun (nerves, muscles, joints)?

4.What about your footwork? Is it alive enough for this kind off situation?

5.What drills do you think would help? It can could from any art once you mod it to use wing chun concepts.